The Fourth Dimension by Drew Olbrich

 

Last week The Fourth Dimension was temporarily free. It's an interactive book that's quite good.

 

I'm a huge fan of Flatland and Sphereland and the various cartoon adaptations.  This is not an adaptation.


What's particularly cool: spinning a 4-dimensional tesseract in 3D space as well as in 4D space. Also, by analogy, how a cube's shadow plays out on a 2-dimensional surface followed by the tesseract's shadow on 3-dimensions.  Very cool graphics.
https://itunes.apple.com/app/id504201783?mt=8&&referrer=click%3Dea309526-dd89-4537-b0ff-7d7a2a669db0